diff options
| author | Brian King <brking@linux.vnet.ibm.com> | 2012-08-24 16:50:59 -0500 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-09-24 12:10:58 +0400 |
| commit | a077c7faf3cb3e28303ba431148a85f613f4e955 (patch) | |
| tree | c60145d43096534a189c3ce948e51f5812c9f9f6 | |
| parent | 7731e6bb312ec8bb7892c465401dbc7119aea785 (diff) | |
| download | linux-a077c7faf3cb3e28303ba431148a85f613f4e955.tar.bz2 | |
[SCSI] ibmvfc: Fix double completion on abort timeout
If an abort request times out to the virtual fibre channel adapter,
the ibmvfc driver will kick off a reset of the adapter. This
patch ensures we wait for the both the abort request and the
request being aborted to be completed prior to exiting the
eh_abort handler. This fixes a bug where the ibmvfc driver
was erroneously returning success to the eh_abort handler
then later sending back a response to the same command.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
| -rw-r--r-- | drivers/scsi/ibmvscsi/ibmvfc.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index 134a0ae85bb7..4f73daccc9f1 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -2242,6 +2242,21 @@ static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) } /** + * ibmvfc_match_evt - Match function for specified event + * @evt: ibmvfc event struct + * @match: event to match + * + * Returns: + * 1 if event matches key / 0 if event does not match key + **/ +static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) +{ + if (evt == match) + return 1; + return 0; +} + +/** * ibmvfc_abort_task_set - Abort outstanding commands to the device * @sdev: scsi device to abort commands * @@ -2322,7 +2337,20 @@ static int ibmvfc_abort_task_set(struct scsi_device *sdev) if (rc) { sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); ibmvfc_reset_host(vhost); - rsp_rc = 0; + rsp_rc = -EIO; + rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); + + if (rc == SUCCESS) + rsp_rc = 0; + + rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); + if (rc != SUCCESS) { + spin_lock_irqsave(vhost->host->host_lock, flags); + ibmvfc_hard_reset_host(vhost); + spin_unlock_irqrestore(vhost->host->host_lock, flags); + rsp_rc = 0; + } + goto out; } } |